CVE-2021-46932 (GCVE-0-2021-46932)

Vulnerability from cvelistv5 – Published: 2024-02-27 09:44 – Updated: 2026-05-11 13:44
VLAI?
Title
Input: appletouch - initialize work before device registration
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < d1962f263a176f493400b8f91bfbf2bfedce951e (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < a02e1404e27855089d2b0a0acc4652c2ce65fe46 (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < 975774ea7528b489930b76a77ffc4d5379b95ff2 (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < 9f329d0d6c91142cf0ad08d23c72dd195db2633c (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < e79ff8c68acb1eddf709d3ac84716868f2a91012 (git)
Affected: 5a6eb676d3bc4d7a6feab200a92437b62ad298da , < 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 (git)
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Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 4.4.298 , ≤ 4.4.* (semver)
Unaffected: 4.9.296 , ≤ 4.9.* (semver)
Unaffected: 4.14.261 , ≤ 4.14.* (semver)
Unaffected: 4.19.224 , ≤ 4.19.* (semver)
Unaffected: 5.4.170 , ≤ 5.4.* (semver)
Unaffected: 5.10.90 , ≤ 5.10.* (semver)
Unaffected: 5.15.13 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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This warning is caused by\\nwork-\u003efunc == NULL, which means missing work initialization.\\n\\nThis may happen, since input_dev-\u003eclose() calls\\ncancel_work_sync(\u0026dev-\u003ework), but dev-\u003ework initalization happens _after_\\ninput_register_device() call.\\n\\nSo this patch moves dev-\u003ework initialization before registering input\\ndevice\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: Entrada: appletouch: inicializa el trabajo antes del registro del dispositivo Syzbot ha informado una advertencia en __flush_work(). Esta advertencia es causada por work-\u0026gt;func == NULL, lo que significa que falta la inicializaci\u00f3n del trabajo. Esto puede suceder, ya que input_dev-\u0026gt;close() llama a cancel_work_sync(\u0026amp;dev-\u0026gt;work), pero la inicializaci\u00f3n dev-\u0026gt;work ocurre _despu\u00e9s_ de la llamada input_register_device(). 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      "dataType": "CVE_RECORD",
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  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.